INTRODUCTION TO PUBMED B TUTORIAL

Martha Kirby

Description

Advanced PubMed Tutorial 1 Drexel Univ. College of Medicine, Sep. 2011 ADVANCED PUBMED TUTORIAL MEDLINE is an important professional tool, with powerful search options not available in web search applications like Google. It leads to journal articles that update and expand on information from textbooks and the web. This tutorial shows how to improve search efficiency, and to avoid missing information when completeness counts. HOW IS PUBMED DIFFERENT FROM OVID MEDLINE? PubMed Advantages: 1) Includes very recent items, even before subject headings are assigned. 2) Available at no charge. PubMed Disadvantages: Search details are less visible in PubMed; harder to learn systematic searching? HOW TO USE THE TUTORIAL: A “live” PubMed connection is important. Seeing what happens online helps you learn. Read until you see a box  indicating it’s time to take action online. You can check the boxes to mark your place. Allow enough time to read carefully and think about what you are doing. HOW DO I CONNECT?  Go to http://www.library.drexel.edu , then click Health Sciences (top of page).  Find Quick Links on the Health Sciences Libraries page, and click MEDLINE (PUBMED)  If you are off-campus, type your Drexel email username/password. Avoid DrexelOne login -- It times out, interrupting your search. Avoid login at http://pubmed.gov, because Drexel full text links won’t appear. ...

Informations

• Publié par: Vuin
• Nombre de lectures: 32
• Langue: English

Extrait

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 1 ADVANCED PUBMED TUTORIAL MEDLINE is an important professional tool, with powerful search options not available in web search applications like Google. It leads tojournal articlesthat update and expand on information from textbooks and the web. This tutorial shows how toimprove search efficiency, and toavoid missing informationwhen completeness counts. HOW IS PUBMED DIFFERENT FROM OVID MEDLINE? PubMed Advantages:1) Includes very recent items, even before subject headings are assigned. 2) Available at no charge.PubMed Disadvantages: Search details are less visible in PubMed; harder to learn systematic searching? HOW TO USE THE TUTORIAL: A“live” PubMed connectionis important. Seeing what happensonlinehelps you learn.Readuntil you see a boxindicating it’s time to take action online. You can check the boxes tomark your place.Allow enough timeto read carefully andthinkabout what you are doing. HOW DO I CONNECT? Go tohttp://www.library.drexel.edu, then clickHealth Sciences(top of page). FindQuick Linkson the Health Sciences Libraries page, and clickMEDLINE (PUBMED) If you are offcampus, type your Drexel email username/password. AvoidDrexelOnelogin  It times out, interrupting your search. Avoidlogin athttp://pubmed.gov, becauseDrexel full textlinks won’t appear. Be surePubMedis the currentlyopen database (look forPubMedat top of screen). DEFAULT SEARCH – QUICK & DIRTYand MAPPING, MESH, AND TEXT WORDS Search 1. Find articles onprevention of heart disease in patients with diabetes, as follows: PubMeddefault searchallows typingmultipletopics at once. In the search box type:prevention heart disease diabetes then clickSearch. Look at titles in the results.Do some results seem less relevantthan others? Why? How did PubMed do the search? Find out by scrolling down to “Search Details” on the right side of the page. Then clickSee more…(below Search Details box, to see PubMed search strategy, based on what you typed. PubMed tried to "map" to standardizedMedical Subject Headings (MeSH)assigned by indexers. Mapping= software feature that finds MeSH Headings to match the topic you typed. MeSH =Medical Subject Headingfrom a list maintained by the National Library of Medicine. MeSH Headings arestandardized, while authors’ words for a topic can vary. For example, authorsmay usekidney failure, renal failure, or renal insufficiency, butindexers consistently assign theMeSH heading: “Renal Insufficiency”. Subheading= a secondary topic that an indexer can link to a MeSH Heading

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 2 TheDetailsbox shows  PubMed mapped to3 MeSH:Heart Diseases, Diabetes InsipidusDiabetes Mellitus,  TheSubheading “Prevention and Control”was searched, but it wasnot linkedto Heart Diseases – so results may include prevention of diabetes and other diseases as well as prevention of heart diseases.  Words intitles, abstracts, etc. were searched [All Fields], but variations were ignored, omitting “diabetic(s)”, “prevent(s)”, “preventing”, “cardiac disease(s)”, etc. You were not offered asearchasmajortopicoption, so results include lessrelevant items. Click the clear button (xin a gray circle inside the search box), then try a 2nddefaultsearch, as follows: Search 2:diet therapy in type2 diabetes In the search box type:diet therapy type 2 diabetes and clickSearch. Do they relate strongly to diet therapy of type 2 diabetes?Scan the results. Again, with no searchasmajortopicoption, diabetes or diet therapy may beminortopics. FindSearch detailson right side of the page, and clickSee more… to see how mapping operated in default search: Diet Therapy[Subheading] wasnot linkedto Diabetes Mellitus, so results may include diet therapy of other diseases.  PubMed mapped toMeSHTerms:Diet TherapyDiabetes Mellitus, Type 2.  PubMed addedwords[All Fields] exactly matching what you typed but omitted variations like “diabetic(s)”, “dietary treatment”, “dietary guidelines”, “weightreducing diet”). MESH DATABASE – BETTER MAPPING TO MESH SUBHEADING LIST, MAJOR TOPIC, EXPLODE, TREE DISPLAY The MeSH Database offers better mapping to MeSH and bettertargeted results. Search 2a: diet therapy in type2 diabetes (same as before, but usingMeSH Database) You can open the MeSH Database several ways, including: Open the menu next to the search box, and selectMeSHfrom the pulldown menu. Mappingworks bestif you typeone topic at a time. Begin with the most important topic. Clear the searchbox (x) if needed. Typetype 2 diabetes and clickSearch. You should be in a different database now (Look at the top banner. MeSH) You should see the“Full”displayfor theMeSHtermDiabetes Mellitus, Type 2. Full display includes the Subheading list. Scroll down toSubheadings, and look for one that matches the 2nd search question topic diet therapy. Click the box in front ofDiet Therapy.  This links Diet therapy (2ndary topic) to Diabetes Mellitus, Type 2. Find theRestrict Search to Major Topicbox below the list of Subheadings. For MeSH,major topicmeans theindexer tagged this MeSHterm as amajor point(focus)

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 3 of the article. If you check the box you getfewerresults (majorIf you leave it unchecked you gettopic only). more results:minortopic as well asmajortopic. LARGE results can be expected for this search, socheck the major topic boxto eliminate items where diet therapy of type 2 diabetes is NOT a major point. Scroll down toEntry Termsare. These synonyms and word variationsfor type 2 diabetes. Scroll farther down to theTreeDisplay, showingBroader/Narrower MeSH. Diabetes Mellitus, Type 2PubMed willhas one indented (more specific) MeSH. automatically Explode(add indented MeSH), unless you check “Do not include MeSH terms found below this term…”Scroll up to see this checkbox below the Major topic check box. Exploding is OK in this case, soleavethe“Do not include…”boxunchecked. Note”Related Information”linksClickingnext to the Subheadings. PubMed(orPubMed Major Topic) exits MeSH and searches PubMed – but ignores your selection of Subheadings and/or Do not include… To retain those selections you must use thePubMed search builder,as described below. To search this MeSHinPubMed: ClickThe PubMed search builder box at upper right should be empty. Add to search builder  Now the search builder box should show: "Diabetes Mellitus, Type 2/diet therapy"[Majr] [Major topic][MeSH] [Subheading] Click[Search PubMed](below search box) toexitMeSH Database andsearch PubMed. Look forPubMedin the top banner to confirm that you are back in PubMed. Scan the results from"Diabetes Mellitus, Type 2/diet therapy"[MAJR] How do these results compare with the previous search? Using MeSH Database can producemore focusedresults, with fewer irrelevant results than the default search.Noterecentitems may be missed, if they have no MeSH Headings yet. What words are used to expressLook at titles of the results. diet therapy? MeSH search retrieved word variations even though you didn’t type them. That’s because indexersrecognized diet therapyno matter what words authors used, and assigned the standard MeSHSubheading= Diet Therapy. ADD LIMITS – ENGLISH LANGUAGE, HUMANS ClickLimits(below the search box) andscroll downto see types of limits available. **Note Full Text limits are not reliable UseDrexel Get It textlinks instead (p.9). UnderSpeciesselectHumans, and underLanguagesselectEnglish. Scroll up (or down) and clickSearchto apply these limits to the query already in the search box.  Notice the “ΔLimits activated” alert above the list of results. To see anabstractSometimes there is no abstract.(if available), click the article title. To displayabstractsonone scrollable page,go Backto the results page; clickDisplay settings(top left); clickAbstract, [Apply]; then scroll down to view abstracts.

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 4 DISPLAY MESH HEADINGS Look for the[+]at the end of each result. Pick a result where “MeSH Terms” appears in the text next to the [+], indicating the item has been indexed (has MeSH). Clickthe+sign. Look for anasteriskfollowing some MeSH Headings. A MeSH with an asterisk was tagged by an indexer as amajor topic, e.g.Diabetes Mellitus, Type 2/diet therapy* Why look at MeSH? If you pick ahighlyrelevantitem and view MeSH assigned to it, you may discover one that had not occurred to you, or that PubMed could not map to. Adding it to the search may improve results. CAN’T MAP TO MESH? If Mapping fails, usedefaultsearch, but remember to view MeSH assigned to highly relevant results. If you see a good MeSH, search it in the MeSH Database, adding Subheadings, Major Topic option, etc. If no MeSH matches your topic, continue with default search. COMBINING MESH TOPICS The last search required 1 MeSH linked to a Subheading. A search with2 separate MeSHlooks different. Try search 1 again, usingMeSH Databaseto map to MeSH,onetopic at a time: Search 3:prevention of heart disease in patients with diabetes [using MeSH Database] 2 critical topics:diabetes,heart disease Secondary topic: prevention In the menu next to the search box, selectMeSH, andclear the search boxif needed (x). Typediabetes (1 topic only!) and clickSearch. In the MeSH database, clickDiabetes Mellitus(blue link) to openFull display. Is there aSubheadingthat exactly matches “heart disease” or “prevention”? “Prevention & Control” is available but should be linked to heart disease, not diabetes. “Complications” is not an exact match for heart disease, so don’t check that. If no Subheading exactly matches, don’t pick any PubMed will searchallSubheadings, plus instances when NO Subheading was assigned. Check Restrict toMajortopic Scroll down to see the MeSH indented below Diabetes Mellitus (specific types of diabetes). PubMed will add these (explode) by default. Click[Add to search builder]then look for“Diabetes Mellitus”[Majr]in search builder box. Click[Search PubMed]toexit MeSHdatabase and search in PubMed. Note – You can combine2 differentMeSHbeforeexiting MeSH Database. However, for advanced searching it’s best to searchonetopicin MeSH Database,exitto PubMed, thenreturn to MeSH Database for the 2nd topic. This keepsdifferent topicsindifferent search results,allowingmore flexibilitywhen combining MeSH and text words (more on this later). On the results page, selectMeSHdatabase again using the pulldown menu nd Clearthe search box, then type the 2 critical topic heart disease and clickSearch. In the MeSH database, clickHeart DiseaseS(blue link) to open the“Full”display Does a Subheading exactly match the 3rd topic?. Click the box in front ofPrevention & control Check Restrict toMajor topic

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 5 Scroll down to see MeSHindentedunder Heart Diseases, naming specific diseases. PubMed automatically explodes (adds the indented MeSH). Scroll back up and click[Add to search builder] Look for "Heart Diseases/prevention and control"[Majr]in the search builder box. Click [Search PubMed]toexit MeSH databaseand search in PubMed. NowCOMBINE RESULT NUMBERS FROM SEARCH HISTORY. To see Search History, clickAdvanced(below search box). Note below Search History (underMore Resources) aMeSH Databaselink  another way to open MeSH Database when you are on the Advanced page. Ignore it for now. Search historyis inreversechronologic order  latest result is at the top. Result numbers may be missingif they were created in MeSH Database instead of PubMed. You should see the following, though your results numbers may be different:  #10 Search"Heart Diseases/prevention and control"[Majr19XXX] Limits: Humans, English #13 Search"Diabetes Mellitus"[Majr]132XXXHumans, English  Limits: Note: Humans & English limits remain in effect from search 2. UseANDtofind different topicsin theSAME article Scroll up past the Search Builder box ,andClearthe search box, if not already clear Option 1:Type result numbers including the # sign, e.g.: Capitalizing#10 AND #13 “AND”and insertingcorrect numbersfrom your search. ClickPreview, not search.  no typingOption 2 :Clear the search box as needed.Leftclick result numbersto transfer them to the search box (e.g. click#10, clickAND, click#13, clickANDat search). Look box – does it look OK? ClickPreview(not Search)tokeep history open, then clickMore Historyto see all results. Compare the number of new results with earlier, default search results. View new results by clicking thenumberin theResultcolumn. Are results closely related to the question? MeSH, Subheadings, and Major topic cansave time by targeting highlyrelevantresults. SEARCH RECENT YEARS ONLY ClickLimits(below search box). UnderDates, select an option, last5 years Be sure the search box still contains your last search, then clickSearch. Results should be much smaller than ALLyears results. Warning:If thesearch box isempty, the Dates limit retrieves ALL items published in those years. This result must be combined with other results usingAND. ADDING TEXT WORDS TO MESH MeSH search is powerful, yetitcan’t always succeedbecause • Verynew& veryolditems lack MeSH. Text word search is the only way to find them. • There isno MeSH for some topics(e.g. length of labor) • Indexers don’t assign MeSH for every topic in the title/abstract, but text word search can find every word. •NewMeSHarenot retroactive,so older articles lack the new MeSH Where MeSH fails, text words serve as a safety net, and vice versa.

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 6 TEXT WORD CHALLENGE – WORD VARIATIONS Title/abstract words arenot standardized. To avoid missing relevant items, you must search synonyms(vitamin C, ascorbic acid);wording, ion, ed, s); differentendings (prevent spacingsRU486, RU 486, RU486;British spellings:paediatric, haemolysis, etc.. Help with synonyms? 1. Scan titles inMeSH results. 2.Entry term listin MeSH database. Asterisk(*) is PubMed’struncation characteror “wild card”. Placing * after aword stem retrieves the stem followed by ablankspace ORany characters,  e.g.prevent* retrievesprevent, prevents, preventing, prevented, prevention…  Warning: Theasterisk prevents mapping to MeSH. Use itonlyfortext word search. Search 4: prevention of heart disease in patients with diabetes [Adding text wordsto supplement MeSH] You can type text word variations in the Search box, where PubMed searches all parts of a record includingtext words (title/abstract words). Word variations forheart diseaseinclude cardiac disease(s), coronary disease, heart disease(s). Clearthe search box and type:(heart[ti] OR cardiac[ti] OR coronary[ti] ) AND disease*[ti] “AND” and “OR” are=capitalized; *(asterisk) different word endings; Parenthesesensurecorrect logic Combinations inparenthesesare performed first. TEXT WORDS IN TITLE ONLYtext words, appearing in the title indicates For major topic. Add[ti] ifIn this case, YES. Ouryou want the topic to be a major point in the results. MeSH search was restricted toMajor Topic, so thetext wordsearch should bemajor topic also. If MeSH wasnotsearched as Major topic, omit [ti] for the text word search. ClickSearch Clearthe search box, typepreventionwords:prevent*[ti] OR protect*[ti]thenSearch. Clearthe search box, typediabet*[ti] thenSearch. On Advanced search page, yourHistoryshould be like this, after clickingMore History: #18 Searchdiabet*[ti]31xxxLimits:, Humans, Eng, last 5 yrs #17 Searchprevent*[ti] OR protect*[ti]Limits: Humans, Eng, last 5 yrs 34xxx #16 Search (heart[ti] OR cardiac[ti] OR coronary [ti] ) AND disease*[ti] Lim: Hum… 11xxx #15 Search (#13) AND (#10) Limits: Humans, Eng last 5 yrs 1xx #14 Search (#13) AND (#10) Limits: Humans, Eng 4xx #13 Search"Heart Diseases/prevention and control"[Majr] Limits: Humans, Eng 19xxx #10 Search"Diabetes Mellitus"[Majr] Limits: Humans, Eng 132xxx  Tip:Deleteunwanted results (errors) by clicking the result number and selectingdelete. Is there atext wordsearch that matches#13? Not yet; create it by combiningtext wordresults forheart disease(#16) andprevention(#17). Clearsearch box;combinethe 2 results usingAND. ClickPreview(keep history open). New result:4xxSearch #16 AND #17 Limits: Humans, English , last 5yrs  #19 Next, create aheart disease prevention“superset”by combining results of the2 heart disease preventionsearches (#13, #19). UseORwith word variations for theSAME topic.

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 7 Clearsearch box, combine result numbers withOR, andPreview. New result: #20…Search#13 OR #19Limits: Humans, English, 5yr 5xxx This superset containsuniqueresults from MeSH (not found via text words) and unique results fromtext words (not found via MeSH), with duplicates removed. Now create adiabetes superset, by combining the2 diabetes results(#18, #10), Clearsearch box, enter result numbers combined withOR, andPreview New result: #21 Search #10 OR #18 Limits: Humans, English, 5yr 37xxx Finally, combine the 2supersets(heartdiseaseprevention, diabetes)usingAND(different topics). Clearsearch box, enter result numbers combined withAND, thenPreview New result: #22 2xxSearch #20 AND #21 Limits: Humans, English, 5yrs Looking at Search history,comparenumber of results versus theMeSHonly, last 5 years results. Adding text words usually increases the results.  Which results came fromMeSH alone1xx? #15  Which results wereaddedbytitlewords (includes MeSH + text word combinations)? Clearthen search #22 NOT #15 Result: 2x View the results added by title words. Are they good or bad? Text wordsmay add junk, e.g. :Renal protective effect of metabolic therapy in patients with coronary artery disease and diabetes(protection against kidney disease instead of heart disease) They may also add valuable items, e.g. Primary prevention of cardiovascular diseases in people with diabetes mellitus: a scientific statement from the Amer. Heart Assoc. …(MeSH = Cardiovascular Diseases/prevention & control instead of Heart Diseases/prev & control) . Coronary heart disease in patients with diabetes: pt. I: recent advances in prevention and noninvasive management.(MeSH=Coronary Disease/prev & control but not tagged as Major topic). These would have been missed by our MeSH alone. Combining MeSH and text words takes advantage of strong points of each.Use both when you need to avoid missing good articles (patient care, publication, etc.) SEARCHSAME WORDWORD?AS TEXT MESH AND  AS Can results be different? Yes! Text word results depend on words in title or abstract,no matter what MeSH was assignedresults depend on subject headings assigned by an indexer. MeSH –no matter what words are in title or abstract. COMBINING MESH AND TEXT WORDS – CHANGING TO MAJOR TOPIC Search 5 Seizures (or epilepsy) caused by video games First, reset limits and clear search history from PubMed and MeSH databases, as follows: In Advanced Search, clickClear History(below Search History) to clearPubMedhistory. Still on the Advanced Search page, scroll down toMore Resources, and clickMeSH Database. Open Advanced Search,Clear Historyfor the MeSH Database.  Scroll down toPopularlinks andclick PubMed. On Limits page, keep Humans & English, but forDatesselectAny Date.ClickSearchto set the revised limits

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 8 Start the new search by finding MeSH =video gamesin theMeSH Databasepick any. Don’t Subheading (all will be searched). Don’t restrict to major topic yet. Click [Add to search builder], thenSearch PubMed. What word variations for video games do you see?Look at titles from the MeSH search. (computer games, online gaming, etc.). Type video gametext word variations(synonyms & different word endings) in search box, separated byOR. ClickSearch. In search history, find the2 video games resultsClear the search box,(MeSH vs. text word). thencombine result numbers using OR, to create a video games “superset”. Next topic: Open MeSH database and mapseizurestoMeSH=Seizures. The Tree display shows seizuresindented below Epilepsy. ClickEpilepsy(in Tree display) to select that MeSH instead. Scroll down to see MeSH indented underEpilepsy, including Seizures and many more. Don’t restrict to major topic. IncludeallClick [subheadings (don’t pick any). Add to search builder],but don’tSearch PubMedyet . Addword variationsforseizures/epilepsyto the search builder boxwhile still in the MeSH Database, separated byOR ,e.g."Epilepsy"[Mesh] OR epilep* OR seiz* This creates an epilepsy/seizures superset (MeSH or text words) without an extra step of combining separate results for thesame topic.Now click [Search PubMed]. Open search history, and useANDto combine the supersets forvideo games and seizures. Your history should be similar to this (start at the bottom): #9 Search (#8) AND (#4) Limits: Humans, English 8x #8 Search "Epilepsy"[Mesh] OR epilep* OR seiz* Limits: Humans, English 87xxx #4 Search (#2) OR (#3) Limits: Humans, English 2xxx #3 Search (video OR computer OR electronic OR online OR digital) AND (Parentheses ensure  (game* OR gaming) Limits: Humans, English 2xxx correct logic) #2 Search "Video Games"[Mesh] Limits: Humans, English 1xxx Are the results for #9 welltargeted? To focus better, makevideo games a major topicHistory, copy and paste. In "Video Games"[Mesh]Change [Mesh] to [into the search box. Majr] and clickPreview(keep History open). Look for the new result: “Video Games”[Majr]– with smaller results than before. Clear search box, then copy & pastevideo games text wordsinto the search box,adding [ti] aftereach word(title = major topic). Click Preview to see the new Title word result. Clear search box, thencombinethe2 new video games results([Majr] and [ti])using OR, to create a majortopic superset. Preview Combine the newmajortopic video game supersetwith theepilepsy supersetusingAND. Latest history should look like this: #13 Search (#8) AND (#12) Limits: Humans, English 4x #12 Search (#10) OR (#11) Limits: Humans, English 9xx #11 Search (video[ti] OR computer[ti] OR electronic[ti] OR online[ti] OR digital[ti]) AND  (game*[ti] OR gaming[ti] OR arcade*[ti]) Limits: Humans, English 5xx #10 Search "Video Games"[Majr] Limits: Humans, English 7xx Do results in#13show stronger emphasis on video games? NOTE:create a “superset” (MeSH OR text words) for each topic BEFORE combining different topics. What’s wrong with (topic1MeSH AND topic2MeSH) OR (topic1textwords AND topic2textwords)? You miss MeSH + text word combinations like (topic1MeSH AND topic2textwords). Best results:(topic1MeSH OR topic1text words) AND (topic2MeSH OR topic2textwords). See avideoof this search at:http://rmcp.dcollege.net/playlists.aspx/656/18018/html

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 9 REVIEW ARTICLES, VALID CLINICAL EVIDENCE Review articles summarize the published literature – saving your time! InSearch History; click# of resultsfor thevideo games (major topic) superset(>900 items) ClickThe result page has a “Filter your results” option (upper right). Review(5x items). Do you see good literature review articles onvideo games? Some reviews summarize literature on a narrowlydefined topic, instead of a broad overview. To find reports ofClinical Trials, orMetaAnalysisof clinical studies, changeLimits: UnderType of ArticlecheckMetaAnalysisandRandomized Controlled Trial. Be sure the Search box still contains the video games (major topic) superset. If not, you can type the correct result # or copy/paste into the search box. ClickSearch. Results should be randomized controlled trials or metaanalyses involving video games. RemoveType of Articlelimits by unchecking the boxes, and clickingSearch. CLINICAL QUERIES / SYSTEMATIC REVIEWS Clinical Queries offers another way to findvalid evidence for patient care. OnAdvancedsearch screen, findClinical Queries(underMore Resources) and click it. In the search box, typetype 2 diabetes diet therapyand clickSearch. In theleftcolumn, see what happens if you select a differentScope (Narrow?) orCategory. Would these items help in patient management? Are Clinical Queries resultswell targetedQueries uses PubMed? Clinical defaultsearch, with no Major Topic or Subheading options. Thecentercolumn showsSystematic Reviews(over 200). In a systematic review, authors select a patient care question, critically evaluate reports of clinical trials on that question, and determine whether the evidence is strong or weak. Systematic Reviews Limit Alternatively, you can use advanced search techniques (MeSH as Major Topic, adding title words), then add a limit: Backup toAdvancedthe search box is empty, type a result number (e.g. video gamespage. If major topic superset) from the history. Open theLimitspage, findSubsets = Systematic Reviews, select the limit, andSearchare likely to be welltargeted.. Results RELATED ARTICLES FEATURE While viewing results from the last search, pick an item that interests you. Click the blueRelated Citationslink and wait for a new list to display. ThefirstOther items have similar MeSH Headings and textitem is the one you started with. words. Best matches appear near the top of the list. ARTICLE FULL TEXT Warning:TheFree Full Textfilter misses articles Drexel pays for! Avoid this filter. Full Text linksappear in theabstractdisplay. Open anyabstractdisplay and look for2 types of full text links: 1)PubMed full text links–Not based on Drexel Library subscriptions; not reliable unless they specify FREE full text.

Advanced PubMed Tutorial Drexel Univ. College of Medicine, Sep. 2011 10 2)Get It– For full text purchased by Drexel Libraries for students and staff. Click aGet It Drexel Full Textbutton. Anewbrowserwindowshould open.  TheGet Itwindow shows your item and an availability message. If you see “Content is available via the following links” Click the blue “Article” link to connect to full text. Another window opens at the journal web site. If the article doesn’t open immediately, find the correctjournal issueandpage. Don’t remember the volume/issue/page? Refer to the Get It window or PubMed window, which should still be open.  Hint: OpenPDF format, if offered, and useAcrobat’s print iconforbest printing. When finished,closethearticleandGet It windows, and return to PubMed. If you see “scroll downNo Drexel online access available” to see other options:Search the library catalog(find it on library shelves?) orBorrow this item through Interlibrary Loan(ILLiad) – takes 12 days in most cases. Close any Drexel Full Text Options and full text article windows. Please alert library staff about problems with Get It links, so we can fix them Thanks! PRINT, SAVE, OR EMAIL RESULTS You canSelectresults to print/save/email: Return to search results (Back), then click checkboxes of several items from the list. Open the[Send to]menu (belowSearch) and selectClipboard, where you can accumulate results of different searches for later printing, saving, emailing. ClickAdd to Clipboard. When finished, click “n items”next toClipboard (upper right) to see items selected. Toprint, openDisplay settings. Select a format,Applyit, then use browser Print button. Tosave or email, open theSend Tomenu and selectFile(download),Email(up to 200 results in each email),CollectionsorMy Bibliography(save online after registering for MyNCBI). Toprint/save/email ALL itemsfrom a search, without checking any boxes, Pick a search in the Search History with more than 200 results. Toprint, useDisplay Settingsto select a format and number of citations to display (200). Use browser print buttons. For items 201400, go to page 2 of the display, then print. Toemail, clickSend To:EMail, then select a format.Summary(text)andAbstract(text) nd formatsgroup ofeliminate graphics. For the 2 You may email up to 200 results at a time. 200 items, type 201 in the “Start from citation” box.  Tosave, clickCollectionsorFileorMy Bibliography; you may save more than 200 items. FIND A KNOWN ARTICLE WHEN INFORMATION IS INCOMPLETE Example: Article byFisherin the journal:Epilepsiain2005volume? pages? title? OpenAdvanced Search. UnderMore Resources, clickSingle Citation Matcher Fill in boxes forAuthor(Fisher),Journal(Epilepsia) andDate(2005) ClickGo PubMed finds 3 papers on epilepsy by Fisher in Epilepsia, 2005. HELPReference librariansare happy to help if you have PubMed problems or questions!